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https://issues.apache.org/jira/browse/HIVE-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Li updated HIVE-14557:
--------------------------
Attachment: HIVE-14557.3.patch
> Nullpointer When both SkewJoin and Mapjoin Enabled
> ---------------------------------------------------
>
> Key: HIVE-14557
> URL: https://issues.apache.org/jira/browse/HIVE-14557
> Project: Hive
> Issue Type: Bug
> Components: Physical Optimizer
> Affects Versions: 1.1.0, 2.1.0
> Reporter: Nemon Lou
> Assignee: Rui Li
> Priority: Major
> Attachments: HIVE-14557.2.patch, HIVE-14557.3.patch,
> HIVE-14557.3.patch, HIVE-14557.patch
>
>
> The following sql failed with return code 2 on mr.
> {noformat}
> create table a(id int,id1 int);
> create table b(id int,id1 int);
> create table c(id int,id1 int);
> set hive.optimize.skewjoin=true;
> select a.id,b.id,c.id1 from a,b,c where a.id=b.id and a.id1=c.id1;
> {noformat}
> Error log as follows:
> {noformat}
> 2016-08-17 21:13:42,081 INFO [main]
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper:
> <MAP>Id =0
> <Children>
> <TS>Id =21
> <Children>
> <MAPJOIN>Id =28
> <Children>
> <FS>Id =16
> <Children>
> <\Children>
> <Parent>Id = 28 null<\Parent>
> <\FS>
> <\Children>
> <Parent>Id = 21 nullId = 33
> <HASHTABLEDUMMY>Id =33
> <Children>null
> <\Children>
> <Parent><\Parent>
> <\HASHTABLEDUMMY><\Parent>
> <\MAPJOIN>
> <\Children>
> <Parent>Id = 0 null<\Parent>
> <\TS>
> <\Children>
> <Parent><\Parent>
> <\MAP>
> 2016-08-17 21:13:42,084 INFO [main]
> org.apache.hadoop.hive.ql.exec.TableScanOperator: Initializing operator TS[21]
> 2016-08-17 21:13:42,084 INFO [main]
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper: Initializing dummy operator
> 2016-08-17 21:13:42,086 INFO [main]
> org.apache.hadoop.hive.ql.exec.MapOperator: DESERIALIZE_ERRORS:0,
> RECORDS_IN:0,
> 2016-08-17 21:13:42,087 ERROR [main]
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper: Hit error while closing
> operators - failing tree
> 2016-08-17 21:13:42,088 WARN [main] org.apache.hadoop.mapred.YarnChild:
> Exception running child : java.lang.RuntimeException: Hive Runtime Error
> while closing operators
> at
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:207)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.exec.MapJoinOperator.closeOp(MapJoinOperator.java:474)
> at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:682)
> at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:696)
> at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:696)
> at
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:189)
> ... 8 more
> {noformat}
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